PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-10:12:30
G05     48.9           16.1                2.4 +/-    2.22       5.9 +/-    2.22  0.100 / 0.210
G10     235.9          11.5               -8.5 +/-   26.89     -22.9 +/-   26.89  0.190 / 0.240
G13     77.4           36.9                8.2 +/-    0.98      12.6 +/-    0.98  0.030 / 0.040
G15     122.3          52.0                8.8 +/-    1.03      10.8 +/-    1.03  0.040 / 0.030
G16     315.8          11.4                2.9 +/-    3.80       7.9 +/-    3.80  0.080 / 0.060
G20     15.9           72.2                5.6 +/-    0.47       5.8 +/-    0.47  0.040 / 0.080
G21     314.3          48.4                4.6 +/-    1.51       5.9 +/-    1.51  0.260 / 0.680
G25     200.3          11.5                2.9 +/-    2.33       7.8 +/-    2.33  0.340 / 0.480
G26     288.1          20.4                6.3 +/-    1.45      13.8 +/-    1.45  0.160 / 0.430
G29     154.2          71.3                9.8 +/-    1.10      10.3 +/-    1.10  0.120 / 0.470